56 PATTNA OF BALUCHISTlN. 



Suborder: CTENOBRANCHIATA, 

 T^NIOGLOSSA. 

 I. HOLOSTOMATA. 

 Family : TUBRITELLIDM 

 Genus : TUBRITELLA, Lamarck. 



TuRBiTELLA, spec. 1. PI. XIV. fig. 9. 



A turreted shell of moderate size, consisting of more than six volutionsj might 

 probably be referred to this genus. The whorls are rather low, and increase only 

 very slowly in height, but they are strongly ventricose, and therefore divided by a 

 deep suture. It seems that they were covered with fine spiral striae separated by 

 interstices of about double their breadth. 



liOCality and stratigrapMeal position. — Mazdr Drik, horizon 8. 



Remarks. — I refrain from making any distinct statements as to the relationship 

 of the above species. Specimens of this description are so inconstant, in their chief 

 characters, that they might be referred to quite a number of species and probably 

 several genera. The probability is that these specimens really belong to the genus 

 Turritella, but they are too badly preserved to permit of any specific determination. 



Ttjkeitella, sp. 2. PI. XIV. fig. 8. 



A small turriform shell, consisting of flat, moderately low whorls^ proves by 

 its markings that there is another species which most likely belongs to the genus 

 Turritella. The ornamentation consists of 5 to 6 equidistant, sharp revolving keels, 

 which are crossed by fine, sharp, longitudinal ribs in such a way that the points of 

 intersection are raised into low tubercles. 



Locality and stratigrapMeal position. — Mazar Drik, horizon 8. 



'Bemarhs. — The only specimen which has come under examination is too badly 

 preserved to permit of a definite determination, but judging from its ornamentation 

 it must be different from the other species, 



Turritella rigida, Sow., seems its nearest relation, but apparently the number 

 of spiral keels is larger in that form. 



TUKRITEIiLA (?) QX7INQUEC0STATA, Spec.'nov. PI. XIV. fig. 10-lOA. 



This is a most remarkable species which I include only provisionally amonff 

 the genus Turritella, because the striae of growth seem to indicate a rather broad 

 slit at the aperture. 



The shell is turreted ; the whorls, which are moderately high, increase very 

 slowly in height and are perfectly flat, all in one plane. There are still six whorfe 



